I've seen the information shown below but I haven't tried it yet.
Hope it helps.
Question
Customer wants to have another or modified ring tone.
Answer
iClarity playback the file C:\Program Files\Avaya\Avaya one-X Attendant\ringIncoming.wav as the ring tone. One can provide another or changed tone with the same filename, in format PCM, 8kHz, 1 Channel, 16 bit, 128kbps.